If you hold your breath for the maximum possible time, what change do you observe in your breathing rhythm?

If you hold your breath for 30 seconds, what is likely to happen to your blood pH?

What do you observe when : Burning sulphur.

What do you observe when Lead nitrate is heated.

What type of mouth parts do you observe in cockroach?

When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe

On the basis of the issues raised in this chapter, what changes would you incorporate in your lifestyle in a move towards a sustainable use of our resources?

How would you prove that the air you breathe out in warmer?

In your locality, if a person is addicted to alcohol, what kind of behavioural changes do you observe in that person? Suggest measures to over come the problem.

While walking across a narrow railroad track, suppose you start to lose your balance. If you start falling to the left which way do you turn your body to regain the balance ? Explain.